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Introduction of Material Standard of Alloy Steel Pipe
Release time:
2023-10-23
The main alloying elements in the steel of the alloy steel pipe, except for individual microalloying elements, are generally expressed in a few percent. When the average alloy content is less than 1.5, only the element symbol is generally marked in the steel grade, but the content is not indicated. However, if it is easy to confuse under special circumstances, the number "1" can also be marked after the element symbol, such as steel grades "12CrMoV" and "12Cr1MoV". The chromium content of the former is 0.4-0.6, the latter is 0.9-1.2, and the other components are all the same.
The main alloying elements in the steel of the alloy steel pipe, except for individual microalloying elements, are generally expressed in a few percent. When the average alloy content is less than 1.5, only the element symbol is generally marked in the steel grade, but the content is not indicated. However, if it is easy to confuse under special circumstances, the number "1" can also be marked after the element symbol, such as steel grades "12CrMoV" and "12Cr1MoV". The chromium content of the former is 0.4-0.6, the latter is 0.9-1.2, and the other components are all the same.
2. Alloying elements such as vanadium V, titanium Ti, aluminum AL, boron B and rare earth RE in alloy steel pipes are all microalloying elements. Although the content is very low, they should still be marked in the steel number. For example, in 20MnVB steel, vanadium is 0.07-0.12% and boron is 0.001-0.005%.
3, alloy steel pipe Secondary specialized school door use of alloy structural steel, steel number crown (or suffix) on behalf of the steel use of the symbol.
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